I have an 3/4 acre area of my 10 acre property that is lower so it is very wet in spring for about 4-6 weeks but drys out in summer. It is clay type soil and fairly flat. What type of trees/ bushes/ plants would survive in conditions like this. We live in zone 5a (on edge of zone 5/4) but in realality we do get -25 to -40 degrees in winter at time (I hate winter!!!). South of Green Bay WI.